[openstack-dev] [nova][cinder] Schedule Instances according to Local disk based Volume?

Zhenyu Zheng zhengzhenyulixi at gmail.com
Fri Feb 24 02:27:43 UTC 2017

BTW, I think this can be done using new placement service, using the custom
resource provider? correct?

On Fri, Feb 24, 2017 at 10:18 AM, Zhenyu Zheng <zhengzhenyulixi at gmail.com>

> Matt,
> Thanks for the information, I will check that; But still I think the user
> demand here is to use local disk from
> compute node as block device, as the data can be remained if the old vm
> got deleted, and we can start a
> new one with the data and having the performance they wanted.
> Kevin Zheng
> On Fri, Feb 24, 2017 at 4:06 AM, Matt Riedemann <
> mriedem at linux.vnet.ibm.com> wrote:
>> On 9/26/2016 9:21 PM, Zhenyu Zheng wrote:
>>> Hi,
>>> Thanks for the reply, actually approach one is not we are looking for,
>>> our demands is to attach the real physical volume from compute node to
>>> VMs,
>>> by this way we can achieve the performance we need for usecases such as
>>> big data, this can be done by cinder using BlockDeviceDriver, it is quite
>>> different from the approach one you mentioned. The only problem now is
>>> that we cannot practially ensure the compute resource located on the same
>>> host with the volume, as Matt mentioned above, currently we have to
>>> arrange 1:1 AZ in Cinder and Nova to do this and it is not practical in
>>> commercial
>>> deployments.
>>> Thanks.
>> Kevin,
>> Is the issue because you can't use ephemeral local disks (it must be a
>> persistent boot from volume)?
>> Have you looked at using the LVM image backend for local storage in Nova?
>> I thought cfriesen said once that windriver is doing high performance
>> config using local LVM in nova.
>> --
>> Thanks,
>> Matt Riedemann
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